#include<iostream>
#include<fstream>
#include<cstdlib>
const int SIZE=60;
int main()
{
	using namespace std;
	char filename[SIZE];
	ifstream inFile;
	cout<<"Enter name of data file: ";
	cin.getline(filename,SIZE);
	inFile.open(filename);
	if(!inFile.is_open()){
		cout<<"Could not open the file "<<filename<<endl;
		cout<<"Program terminating.\n";
		exit(EXIT_FAILURE);
	}
	double value;
	double sum=0.0;
	int count=0;
	
	inFile>>value;
	while(inFile.good())
	{
		++count;
		sum+=value;
		inFile>>value;
	}
	if(inFile.eof())
		cout<<"End of file reached.\n";
	else if(inFile.fail())
		cout<<"Input terminated by data mismatch.\n";
	else
		cout<<"Input terminated for unknown reason.\n";
	if(0==count)
	 cout<<" No data processed.\n";
	else
	{
		cout<<"Item read: "<<count<<endl;
		cout<<"Sum: "<<sum<<endl;
		cout<<"Average: "<<sum/count<<endl;
	 } 
	 inFile.close();
	 return 0;
}
